Answer:
111.6m
Explanation:
First, add the distance from the start to the first hurdle, then add the cumulative distance of all of the hurdles, and finally, add the distance from the final hurdle to the finish line.
15 + (12.3 + 12.3 + 12.3 + 12.3 + 12.3 + 12.3 + 12.3) + 10.5
15 + (86.1) + 10.5
101.1 + 10.5 = 111.6m